Hydraulics and Fluid Mechanics problems
- 1. The hammer blow in pipes occurs when
Options- A. there is excessive leakage in the pipe
- B. the pipe bursts under high pressure of fluid
- C. the flow of fluid through the pipe is suddenly brought to rest by closing of the valve
- D. the flow of fluid through the pipe is gradually brought to rest by closing of the valve Discuss
Correct Answer: the flow of fluid through the pipe is suddenly brought to rest by closing of the valve
- 2. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.
Options- A. less than
- B. more than Discuss
Correct Answer: less than
- 3. The discharge through a channel of trapezoidal section is maximum when
Options- A. width of channel at the top is equal to twice the width at the bottom
- B. depth of channel is equal to the width at the bottom
- C. the sloping side is equal to half the width at the top
- D. the sloping side is equal to the width at the bottom Discuss
Correct Answer: the sloping side is equal to half the width at the top
- 4. The variation in the volume of a liquid with the variation of pressure is called its
Options- A. surface tension
- B. compressibility
- C. capillarity
- D. viscosity Discuss
Correct Answer: compressibility
- 5. A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 6. The absolute pressure is equal to
Options- A. gauge pressure + atmospheric pressure
- B. gauge pressure - atmospheric pressure
- C. atmospheric pressure - gauge pressure
- D. gauge pressure - vacuum pressure Discuss
Correct Answer: gauge pressure + atmospheric pressure
- 7. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
Options- A. path line
- B. stream line
- C. steak line
- D. potential line Discuss
Correct Answer: stream line
- 8. The unit of kinematic viscosity in S. I. units is
Options- A. N-m/s
- B. N-s/m2
- C. m2/s
- D. N-m Discuss
Correct Answer: m2/s
- 9. The intensity of pressure at any point, in a liquid, is
Options- A. directly proportional to the area of the vessel containing liquid
- B. directly proportional to the depth of liquid from the surface
- C. directly proportional to the length of the vessel containing liquid
- D. inversely proportional to the depth of liquid from the surface Discuss
Correct Answer: directly proportional to the depth of liquid from the surface
- 10. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.
Options- A. True
- B. False Discuss
Correct Answer: True
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